The other day I noticed a couple of rust spots on the side of my pool. On closer inspection they are circular areas of corrosion that have bubbled up on this one section of the pool wall. The largest one has a thin stream of water flowing from it. I can't tell if there is a leak in the liner, but I don't seem to be losing more water than to normal evaporation. The sides of the liner are very wrinkled and have been for years. These rust spots are on the low side of the pool, and I wonder if water got behind the liner during a recent heavy rain.
I want to find out:
1. How to fix it.
2. What caused it.
3. How to prevent it from happening again.
The pool is about 7 years old. I would make a warranty claim but my warranty card was returned to sender when I tried to mail it in.